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Symmetry

Special Issue of Symmetry: “Recent Advances in Linear and Nonlinear Optics”

Thomas Noblet, Christophe Humbert

Published Feb 28, 2022• 0 citations
Publisher

Abstract

In this Special Issue, invited researchers elaborate on ‘Recent Advances in Linear and Nonlinear Optics’, demonstrating how sensitive light–matter interactions are concerning symmetry [...]
DOI
10.3390/sym14030495

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Introductory remarks

George William Series

Abstract The subject of light scattering can hardly fail to be of interest to a body of scientists since the eye is the most delicate of our sense organs, but we shall not on this occasion be concerned so much with direct visual experiences as with the evidence concerning the objects of our study obtained from elaborately planned experiments and by the use of highly developed apparatus. Of the many possible ways in which the field might have been divided, it seemed to the organizers that there was a useful distinction to be made between the structure and properties of the scattering objects, which will be our theme on the first day, and the interactions and dynamics, to which we shall turn on the second. I should make it clear at the outset that these terms relate to what can be discovered by the process of light scattering about the objects themselves. The interaction of the light field with the scattering objects is another matter. I have no doubt that our speakers in both sessions will touch upon this from time to time, but some recently studied aspects of this particular interaction will form the subject of Dr Cohen-Tannoudji’s paper. It is a matter of great regret to all of us that Academician Fabelinskii, whom we had invited to give the opening scientific address to this meeting, found himself unable to accept our invitation for reasons beyond his control. Many of us would have wished to thank him personally for having made available to the world of science his wide experience and knowledge by the publication, some ten years ago, of that most valuable book which is to be found on many of our shelves: we were looking forward to hearing of his more recent work. We are indeed sorry that he is unable to be with us.

Philosophical Transactions of the Royal Society of London Series A Mathematical and Physical Sciences•Dec 20, 1979•0 citations
Intensive studies on light–matter interactions and technological breakthroughs, especially conducted in the field of dressed photon research, have led to a growing concern regarding unsettled off-shell quantum field interactions. The Special Issue, entitled “Quantum Fields and Off-Shell Sciences”, was organized to promote the progress of such research activities from a wider perspective, not limited to dressed photon studies. This book contains excellent papers that were published in this Special Issue. It will provide scientific and technical information on the quantum fields and off-shell sciences to scientists, engineers, and students who are and will be engaged in this field.
Intense light-matter interaction largely relies on the use of high-power light sources, creating fields comparable to, or even stronger than, the field keeping the electrons bound in atoms. Under such conditions, the interaction induces highly nonlinear processes such as high harmonic generation, in which the low-frequency photons of a driving laser field are upconverted into higher-frequency photons. These processes have enabled numerous groundbreaking advances in atomic, molecular, and optical physics, and they form the foundation of attosecond science. Until recently, however, such processes were typically described using semi-classical approximations, since the quantum properties of the light field were not required to explain the observables. This has changed in the recent past. Ongoing theoretical and experimental advances show that fully quantized descriptions of intense light-matter interactions, which explicitly incorporate the quantum nature of the light field, open new avenues for both fundamental research and technological applications at the fully quantized level. These advances emerge from the convergence of quantum optics with strong-field physics and ultrafast science. Together, they have given rise to the field of quantum optics and quantum electrodynamics of strong-field processes.
Abstract The subject of light scattering can hardly fail to be of interest to a body of scientists since the eye is the most delicate of our sense organs, but we shall not on this occasion be concerned so much with direct visual experiences as with the evidence concerning the objects of our study obtained from elaborately planned experiments and by the use of highly developed apparatus. Of the many possible ways in which the field might have been divided, it seemed to the organizers that there was a useful distinction to be made between the structure and properties of the scattering objects, which will be our theme on the first day, and the interactions and dynamics, to which we shall turn on the second. I should make it clear at the outset that these terms relate to what can be discovered by the process of light scattering about the objects themselves. The interaction of the light field with the scattering objects is another matter. I have no doubt that our speakers in both sessions will touch upon this from time to time, but some recently studied aspects of this particular interaction will form the subject of Dr Cohen-Tannoudji’s paper. It is a matter of great regret to all of us that Academician Fabelinskii, whom we had invited to give the opening scientific address to this meeting, found himself unable to accept our invitation for reasons beyond his control. Many of us would have wished to thank him personally for having made available to the world of science his wide experience and knowledge by the publication, some ten years ago, of that most valuable book which is to be found on many of our shelves: we were looking forward to hearing of his more recent work. We are indeed sorry that he is unable to be with us.